These Regulations introduce a mandatory requirement to keep calves in groups after the age of eight weeks (except where certified by a veterinarian). The method of calculating space allowance in individual stalls and pens is redefined and space allowances for calves housed in groups are increased. Individual stalls and pens housing calves must allow tactile as well as visual contact. The requirements relating to group housing, space allowances and tactile and visual contact do not apply before 1